Improvement in portable furnaces



2 Sheets-Sheet L J. REYNOLDS.

Portable Furnace.

Patented Mar. 21, 871.

2 SheetS-Shet 2. J. REYNOLDS. I 1

Portable Furnace.

Patented Mar. 21, 1871.

' Wibzesses UNITED STATES PATENT OFFICE.

JESSE REYNOLDS, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN PORTABLE FURNACES.

Specification forming part of Letters Patent No. 112,961 dated March 21, 1871.

To all whom it may concern:

Be it known that I, JEssE REYNOLDS, 'of the city of Philadelphia, in the State of Pennsylvania, have invented a certain new and Figure 1 being aview of a furnace complete for use, in elevation; Fig. 2, a view, also in elevation, of a furnace without the exterior covering or shell being apart thereof; Fig. 3, a view, by vertical section, of Fig. 1; and Fig. 4, a front view of the furnace shown by Fig. 1.

In each of these figures, where like parts are shown, like marks and letters are used to indicate the parts. My invention relates to that class of furnaces intended for heating air for dwellings and other buildings wherein the cold air is passed over the heated surfaces of the furnace, and when heated is distributed to the rooms of the'building, or to such portions thereof as may be desirable, when such furnaces are so constructed and arranged as to be removed readily as a whole, and without detaching of any of the parts thereof. In the trade this kind of furnace is known as a portable furnace.

More commonly furnaces for heating buildin gs are of cast-iron. This is the character of most furnaces in use, whether made to be surrounded by brick-work or by metal.

A material objection to the use of cast-iron is the permeability of the cast metal to the gases produced by combustion of the fuel, which become mixed with the atmospheric air being heated, rendering such air impure and deleterious.

Another objection arises from the difficulty of forming ti ghtjoints without the aid of packing or cement.

Another objection to the use of cast-iron arises from the liability of cast-iron plates to crack under the changes of temperature to which the heating-plates are subjected.

In order to avoid these objections, and others of less importance, I construct my portable furnace, with the exception of the doors and base-piece, entirely of wrought-iron, which may be surrounded by a zinc, galvanized-iron, or other sheet-metal shell, and which, when so surrounded, will be a perfect and complete portable furnace, that can as readily and easily be moved, set up, or taken down as an ordinary stove.

When a furnace is thus constructed it can be used with or without dampers, as may be most desirable to adapt it to any peculiar location.

The drawing of this specification shows how a furnace of one form may be made, and from which it will readily be perceived how my invention may be adapted to other forms.

By this drawing the body of the furnace is shown made up of three parts, a b c, which are joined to each other by screw-bolts or any other suitable means. The plates of each of these parts are of heavy plate or sheet iron, riveted together as in the manner of constructing steamboilers, so that the several parts or plates will have the same degree of expansion or contraction when the furnace is in use.

The feed and draft doors cl e f are made of cast-iron, and have collars or flanges on their inner part, which fit tightly and securely in corresponding collars or surfaces projecting from the body-plates, thus enabling the furnace to be fitted up air-tight.

The door f is provided with a brass slide, planed and nicely adapted, fitting and moving over an aperture in the door, and is used to regulate the admission of air for draft, or checking it to control draft. The bevelin g of the edge on the door and frame and a slight curving or bending of the latch serve to prevent damage to the frame by the expansion of the door when hot, the door relieving itself.

g is the cast-iron bottom frame-work on which the structure rests, and is also a support for the casing. It is open for the admission of cold air.

The casing or shell h may be of galvanized 1 material, and constructed substantially as sheet-iron, tin, Russia sheet-iron, or other herein recited. similar material. This specification signed by me this 9th day I claim as my inventionof August, 1870.

The portable furnace co 1) 0 having air-ti ht 1 doors (1 0 f, the body of 111 16 furnace being JESSE RLYNOLDS' made of plate or wrought iron riveted to- Witnesses: gether like the plates of a steam-boiler, in- LEWIS GODBOU, cased in a sheet of galvanized iron or similar Gr. W. TAYLOR. 

